EP1173947B1 - Forward error correction scheme in a wireless system - Google Patents
Forward error correction scheme in a wireless system Download PDFInfo
- Publication number
- EP1173947B1 EP1173947B1 EP00928288A EP00928288A EP1173947B1 EP 1173947 B1 EP1173947 B1 EP 1173947B1 EP 00928288 A EP00928288 A EP 00928288A EP 00928288 A EP00928288 A EP 00928288A EP 1173947 B1 EP1173947 B1 EP 1173947B1
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- EP
- European Patent Office
- Prior art keywords
- signal
- code
- fec
- processor
- cdma
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0064—Concatenated codes
- H04L1/0066—Parallel concatenated codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
Definitions
- the present invention provides a low latency error correction mechanism for high data rate transmissions over multiple traffic channels in a wireless communication system.
- FEC forward error correction
- decoding decoding and decoding to information signals that are to be transmitted over a wireless channel.
- Forward error correction generally speaking, introduces predetermined redundancy into an information signal to permit a receiver to identify and perhaps correct errors that may have been introduced by a transmission medium.
- the known IS-95 standard for code division multiple access cellular communication specifies a type of convolutional code for each traffic channel transmitted from base station to mobile station or vice versa.
- a high rate data signal may be communicated to a receiver over a plurality of parallel traffic channels.
- the recently proposed IS-95 B standard proposes use of parallel CDMA channels each having a data rate of 9.6 KB/s to provide a higher data rate communication.
- a high rate data signal is demultiplexed into a plurality of lower rate data signals and each of these signals is processed in an independent traffic channel.
- each lower rate data signal has FEC applied to it.
- Wireless communication channels are inherently "noisy" due to channel impairments caused by atmospheric conditions, multipath effects, co-channel interference and the like. Particularly if used for computing applications, where executable content may be expected to be exchanged over traffic channels, the need for powerful FEC techniques will continue to be prevalent.
- Latency refers generally to the delay that extends from the time a request for data is issued by a user and the time when data responsive to the request is presented to the user. FEC introduces decoding delays at a wireless receiver and, thus, contributes to latency.
- U.S. Patent 5,777,990 discloses a system providing additional capacity by allocating an additional traffic radio channel.
- Embodiments of the present invention provide a transmitter/receiver system for high data transfer in a wireless communication system in which a physical layer processor comprises an FEC coder, a demultiplexer and a plurality of modem processors.
- the FEC coder applies error correction codes to the high data rate signal.
- the demultiplexer distributes portions of the coded high data rate signal to the modem processors.
- Each modem processor processes its respective portion of the coded signal for transmission in an independent channel.
- the Figure illustrates a transmitter and a receiver each constructed in accordance with embodiments of the present invention.
- the present invention provides low latency forward error correction for a high data rate wireless transmission by applying forward error correction codes to data prior to multiplexing the data across a plurality of parallel fixed bandwidth traffic channels.
- the Figure is a block diagram of a transmitter 100 and a receiver 200 each constructed according to embodiments of the present invention.
- the transmitter 100 and receiver 200 are illustrated as operating in a layered communication system that includes a transmission layer (110, 210), a physical layer (1120, 220) and higher layer communications such as network layers & data link layers (collectively labeled 130 & 230).
- a transmission layer 110 a transmitter 100 performs carrier modulation, amplification and transmission upon digital data to be transmitted.
- a receiver 200 performs reception, amplification and carrier demodulation to obtain a recovered digital data signal.
- the higher layers 110, 210 of the communication system also may process an information signal as may be required for the application for which the present invention is to be used.
- the physical layer 120 of the transmitter 100 may be populated by an FEC coder 122, a demultiplexer 124 and a plurality of modem processors 126a-1 26n.
- the number of modem processors 126a-1 26n may vary and also may be determined by the quantity of data to be transmitted and the capacity of each of the traffic channels over which the data may be transmitted.
- the FEC coder 122 receives a source signal from a higher layer I 10 in the transmitter and enhances it with an error correction code.
- the enhanced information signal Is output from the FEC coder 122 to the demultiplexer 124.
- the multiplexer distributes the information signal to the modem processors 126a-126n.
- the modem processors I 26a- 26n each format their respective portions of the enhanced signal for transmission. Outputs from the modem processors 126a-1 26n are summed by an adder 128 and delivered to the transmission layer 110.
- the physical layer 220 performs processing that is the inverse of the processing that had been applied in the physical layer 120 of the transmitter 100.
- the physical layer 220 may be populated by an FEC decoder 222, a demultiplexer 224 and a plurality of demodulators 226a-226n. There will be one demodulator 226a-226n for each of the traffic channels that had been allocated to carry the information signal.
- the recovered digital signal from the transmission layer 230 is input to each of the demodulators 226a-226n. Each demodulator 226a-226n outputs a recovered portion of the information signal.
- the demultiplexer 224 merges each of the recovered portions of the information signal into a unitary recovered information signal.
- the FEC decoder 222 performs error detection and correction using error correction codes that had been introduced by the FEC coder 122 in the transmitter 100.
- the FEC decoder 222 outputs a corrected information signal to the higher layers 210 of the receiver 200.
- a receiver 200 need not include an element corresponding to the adder 128 of the transmitter 100; the demodulators 226a226n each perform correlation. As is known, correlation permits a modem processor to discriminate a desired CDMA signal from other CDMA signals that may be present in an aggregate received signal. Thus, in the embodiment of the Figure, the demodulators 226a-226n identify and output respective portions of the recovered enhanced information signal.
- the FEC coder 122 and FEC decoder 222 may generate and decode iterative systematic nested codes, also known as "turbo" codes.
- turbo codes provide an advantage in that the FEC decoding process may be repeated iteratively to improve the information signal recovered therefrom. Thus, the output of a first iteration may be reintroduced to the FEC decoding block (path not shown in the Figure) for subsequent iterations. The nature of the turbo codes generates improved corrected data at subsequent iterations.
- turbo codes introduce a predetermined amount of latency into the decoding process.
- Turbo codes operate on blocks of a predetermined size. For example, one turbo code being considered for a wireless communication system for computer network applications possesses a block size of 4,096 channel symbols.
- An FEC decoder 222 must decode an entire block before a recovered information signal becomes available for the block. This characteristic may be contrasted with convolutional codes which are used in the known IS-95 standard for CDMA cellular communication; convolutional codes are characterized by relatively smaller latency for same-sized block (relative to turbo codes) because it is not necessary to receive an entire block before decoding may begin. It is believed that by distributing the FEC code among several parallel traffic channels as is shown in the Figure, the higher aggregate throughput of the traffic channels ameliorates the latency that would otherwise be introduced by the turbo code.
- turbo codes For high data rate applications using plural parallel traffic channels, it is believed that use of turbo codes achieves a higher figure of merit (lower E b /N o than for convolutional codes.
- E b /N o the turbo code provides a BER of 10 -6 .
- a convolutional code requires an E b /N o of 7 dB or more.
- the techniques of the present invention find application in a variety of wireless communication systems including CDMA systems.
- the base stations and subscriber stations of the wireless communication system will include functionality of both the transmitter and receiver of the Figure. That is, to provide two-way communication, a base station will include a transmitter portion 100 and a receiver portion 200. So, too, with the subscriber terminal.
- the base stations and subscriber terminals may but need not be configured to provide simultaneous full duplex communication.
- a base station of a wireless communication system transmits a plurality of data signals to a variety of subscribers simultaneously.
- each base station may perform the techniques disclosed herein simultaneously on a number of high rate data signals. It is consistent with the spirit and scope of the present invention that each signal may have a data rate that is independent of the data rates of the other signals.
- a base station may be configured to include its FEC coder/decoders 122, 222 and modem processor/demodulators 126a, 226a in a pooled configuration. Such an embodiment permits the base station to assign, for example, a variable number of modem processors 126a126n to a data signal depending upon the rate of the signal to be transmitted.
- the base station may selectively enable FEC coders 122 as the base station receives new data signals to be transmitted to subscribers. Provision of base station processing components in a pooled arrangement is well-known.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Mobile Radio Communication Systems (AREA)
- Error Detection And Correction (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US301484 | 1989-01-26 | ||
US09/301,484 US6614776B1 (en) | 1999-04-28 | 1999-04-28 | Forward error correction scheme for high rate data exchange in a wireless system |
PCT/US2000/010809 WO2000065764A1 (en) | 1999-04-28 | 2000-04-20 | Forward error correction scheme in a wireless system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1173947A1 EP1173947A1 (en) | 2002-01-23 |
EP1173947B1 true EP1173947B1 (en) | 2012-08-15 |
Family
ID=23163590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00928288A Expired - Lifetime EP1173947B1 (en) | 1999-04-28 | 2000-04-20 | Forward error correction scheme in a wireless system |
Country Status (6)
Country | Link |
---|---|
US (4) | US6614776B1 (no) |
EP (1) | EP1173947B1 (no) |
AU (1) | AU4654700A (no) |
DK (1) | DK1173947T3 (no) |
NO (2) | NO332803B1 (no) |
WO (1) | WO2000065764A1 (no) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6785323B1 (en) | 1999-11-22 | 2004-08-31 | Ipr Licensing, Inc. | Variable rate coding for forward link |
US6973140B2 (en) | 1999-03-05 | 2005-12-06 | Ipr Licensing, Inc. | Maximizing data rate by adjusting codes and code rates in CDMA system |
US7593380B1 (en) | 1999-03-05 | 2009-09-22 | Ipr Licensing, Inc. | Variable rate forward error correction for enabling high performance communication |
US6614776B1 (en) * | 1999-04-28 | 2003-09-02 | Tantivy Communications, Inc. | Forward error correction scheme for high rate data exchange in a wireless system |
DE19950653B4 (de) * | 1999-10-21 | 2020-01-16 | Ipcom Gmbh & Co. Kg | Verfahren zum Betreiben eines Mobilfunknetzes |
DE19958510A1 (de) * | 1999-12-04 | 2001-06-07 | Bosch Gmbh Robert | Verfahren zum Betreiben eines Mobilfunknetzes |
US7327775B1 (en) * | 1999-12-23 | 2008-02-05 | Nokia Corporation | CDMA receiver |
US7006483B2 (en) | 2001-02-23 | 2006-02-28 | Ipr Licensing, Inc. | Qualifying available reverse link coding rates from access channel power setting |
JP3850736B2 (ja) * | 2002-02-06 | 2006-11-29 | 富士通株式会社 | 無線信号を利用して伝送される情報を判定する装置およびその方法 |
US7969990B2 (en) * | 2002-07-25 | 2011-06-28 | Oded Shmueli | Routing of data including multimedia between electronic devices |
US7257147B1 (en) * | 2002-12-20 | 2007-08-14 | Cypress Semiconductor Corporation | Encoding viterbi error states into single chip sequences |
EP1978664A1 (en) * | 2007-04-05 | 2008-10-08 | Alcatel Lucent | Transmitting data packets over an air interface |
US20140122977A1 (en) * | 2012-11-01 | 2014-05-01 | Peter Alexander CARIDES | Variable control for a forward error correction capability |
US10396826B2 (en) | 2016-10-26 | 2019-08-27 | Huawei Technologies Co., Ltd. | Software defined network with selectable low latency or high throughput mode |
US10523315B2 (en) | 2017-04-05 | 2019-12-31 | Huawei Technologies Co., Ltd. | Systems and method of multi-band pilot tone based optical performance monitoring |
Family Cites Families (131)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US541538A (en) * | 1895-06-25 | Cistern-forming device | ||
US2115309A (en) * | 1937-04-12 | 1938-04-26 | Roderick M Koch | Flower protecting and display case |
US2828659A (en) * | 1954-07-12 | 1958-04-01 | Hammond Organ Co | Electrical musical instruments |
FR2266389B1 (no) | 1974-04-02 | 1981-09-18 | Texas Instruments Inc | |
US4460992A (en) | 1982-11-04 | 1984-07-17 | The United States Of America As Represented By The Secretary Of The Army | Orthogonal CDMA system utilizing direct sequence pseudo noise codes |
US4625308A (en) | 1982-11-30 | 1986-11-25 | American Satellite Company | All digital IDMA dynamic channel allocated satellite communications system and method |
GB8623763D0 (en) | 1986-10-03 | 1986-11-05 | Marconi Co Ltd | Communication system |
GB2198013B (en) | 1986-11-28 | 1990-07-25 | Marconi Co Ltd | A communication system |
US5027348A (en) | 1989-06-30 | 1991-06-25 | Ncr Corporation | Method and apparatus for dynamic data block length adjustment |
ATE112909T1 (de) | 1990-02-21 | 1994-10-15 | Siemens Ag | Verfahren zur anpassung der blocklänge bei serieller datenübertragung, mit messverfahren für die übertragungsgüte und bevorzugter anwendung des verfahrens. |
CN1062963C (zh) | 1990-04-12 | 2001-03-07 | 多尔拜实验特许公司 | 用于产生高质量声音信号的解码器和编码器 |
US5103459B1 (en) | 1990-06-25 | 1999-07-06 | Qualcomm Inc | System and method for generating signal waveforms in a cdma cellular telephone system |
US5115309A (en) | 1990-09-10 | 1992-05-19 | At&T Bell Laboratories | Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders |
US5602834A (en) * | 1990-12-07 | 1997-02-11 | Qualcomm Incorporated | Linear coverage area antenna system for a CDMA communication system |
DE4210305A1 (de) | 1992-03-30 | 1993-10-07 | Sel Alcatel Ag | Verfahren, Sender und Empfänger zur Informationsdatenübertragung mit veränderlichem Verkehrsaufkommen und Leitstation zur Koordinierung mehrerer solcher Sender und Empfänger |
BR9405406A (pt) | 1993-06-14 | 1999-09-08 | Ericsson Telefon Ab L M | Processo e sistema suscetìvel de múltiplo acesso por divisão de código para sistemas de comunicação celulares |
FR2708162B1 (fr) | 1993-07-20 | 1995-09-01 | Alcatel Mobile Comm France | Procédé pour déterminer la longueur optimale d'un bloc de données dans un système de communication à accès multiple à répartition dans le temps (AMRT). |
JP3457357B2 (ja) * | 1993-07-23 | 2003-10-14 | 株式会社日立製作所 | スペクトル拡散通信システム、送信電力制御方法、移動端末装置及び基地局 |
US5606574A (en) | 1993-09-13 | 1997-02-25 | Matsushita Electric Industrial Co., Ltd. | Mobile unit identifying system and method of demodulating for the same |
FI98687C (fi) | 1993-09-20 | 1997-07-25 | Nokia Telecommunications Oy | Matkaviestinjärjestelmä ja menetelmä etätyöaseman kytkemiseksi matkaviestinverkon kautta dataverkkoon |
US5414728A (en) * | 1993-11-01 | 1995-05-09 | Qualcomm Incorporated | Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels |
US6088590A (en) | 1993-11-01 | 2000-07-11 | Omnipoint Corporation | Method and system for mobile controlled handoff and link maintenance in spread spectrum communication |
US5410538A (en) * | 1993-11-09 | 1995-04-25 | At&T Corp. | Method and apparatus for transmitting signals in a multi-tone code division multiple access communication system |
US5442625A (en) | 1994-05-13 | 1995-08-15 | At&T Ipm Corp | Code division multiple access system providing variable data rate access to a user |
JPH09510596A (ja) | 1994-06-08 | 1997-10-21 | エイチイー・ホールディングス・インコーポレーテッド・ディー ビーエー・ヒューズ・エレクトロニクス | ハイブリッドネットワークアクセスのための装置および方法 |
US5487072A (en) | 1994-06-30 | 1996-01-23 | Bell Communications Research Inc. | Error monitoring algorithm for broadband signaling |
US5603096A (en) * | 1994-07-11 | 1997-02-11 | Qualcomm Incorporated | Reverse link, closed loop power control in a code division multiple access system |
US5614914A (en) | 1994-09-06 | 1997-03-25 | Interdigital Technology Corporation | Wireless telephone distribution system with time and space diversity transmission for determining receiver location |
US6334219B1 (en) * | 1994-09-26 | 2001-12-25 | Adc Telecommunications Inc. | Channel selection for a hybrid fiber coax network |
CA2200978A1 (en) | 1994-10-19 | 1996-05-09 | Mordechai Ritz | Sectorized communication system and methods useful therefor |
JPH08163085A (ja) | 1994-12-02 | 1996-06-21 | Toshiba Corp | 情報通信装置 |
US5559788A (en) | 1994-12-29 | 1996-09-24 | Unisys Corporation | Multiple channel quadrature communication system and method |
US5642348A (en) | 1994-12-30 | 1997-06-24 | Lucent Technologies Inc. | Access director interface for narrowband/broadband information distribution network |
US5608725A (en) * | 1995-01-26 | 1997-03-04 | Motorola, Inc. | Method and apparatus of a communications system having a DMT infrastructure |
ZA961025B (en) | 1995-02-28 | 1996-07-16 | Qualcomm Inc | Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels |
CN1082289C (zh) | 1995-03-16 | 2002-04-03 | 东芝株式会社 | 数据通信装置及方法 |
US5699369A (en) | 1995-03-29 | 1997-12-16 | Network Systems Corporation | Adaptive forward error correction system and method |
MY121893A (en) | 1995-04-28 | 2006-03-31 | Qualcomm Inc | Method and apparatus for providing variable rate data in a communications system using statistical multiplexing. |
US5673259A (en) | 1995-05-17 | 1997-09-30 | Qualcomm Incorporated | Random access communications channel for data services |
US5696766A (en) | 1995-06-02 | 1997-12-09 | Dsc Communications Corporation | Apparatus and method of synchronizing a transmitter in a subscriber terminal of a wireless telecommunications system |
US5742595A (en) | 1995-06-02 | 1998-04-21 | Dsc Communications Corporation | Processing CDMA signals |
US6597913B2 (en) | 1995-06-05 | 2003-07-22 | Motorola, Inc. | Distributed dynamic channel management in cellular systems |
US5784406A (en) | 1995-06-29 | 1998-07-21 | Qualcom Incorporated | Method and apparatus for objectively characterizing communications link quality |
US6049535A (en) | 1996-06-27 | 2000-04-11 | Interdigital Technology Corporation | Code division multiple access (CDMA) communication system |
US6885652B1 (en) * | 1995-06-30 | 2005-04-26 | Interdigital Technology Corporation | Code division multiple access (CDMA) communication system |
ZA965340B (en) | 1995-06-30 | 1997-01-27 | Interdigital Tech Corp | Code division multiple access (cdma) communication system |
US6940840B2 (en) * | 1995-06-30 | 2005-09-06 | Interdigital Technology Corporation | Apparatus for adaptive reverse power control for spread-spectrum communications |
JP3212238B2 (ja) | 1995-08-10 | 2001-09-25 | 株式会社日立製作所 | 移動通信システムおよび移動端末装置 |
US6570865B2 (en) | 1995-08-10 | 2003-05-27 | Hitachi, Ltd. | CDMA mobile communications system and communication method |
US5991308A (en) * | 1995-08-25 | 1999-11-23 | Terayon Communication Systems, Inc. | Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant |
EP2242321B1 (en) | 1995-09-20 | 2015-07-22 | Ntt Docomo, Inc. | Access method, mobile station and base station for CDMA mobile communication system |
US5734646A (en) | 1995-10-05 | 1998-03-31 | Lucent Technologies Inc. | Code division multiple access system providing load and interference based demand assignment service to users |
US6418148B1 (en) | 1995-10-05 | 2002-07-09 | Lucent Technologies Inc. | Burst-level resource allocation in cellular systems |
US5825807A (en) | 1995-11-06 | 1998-10-20 | Kumar; Derek D. | System and method for multiplexing a spread spectrum communication system |
US5790551A (en) | 1995-11-28 | 1998-08-04 | At&T Wireless Services Inc. | Packet data transmission using dynamic channel assignment |
US5842125A (en) * | 1995-11-30 | 1998-11-24 | Amsc Subsidiary Corporation | Network control center for satellite communication system |
US5991279A (en) | 1995-12-07 | 1999-11-23 | Vistar Telecommunications Inc. | Wireless packet data distributed communications system |
US5781583A (en) | 1996-01-19 | 1998-07-14 | Motorola, Inc. | Method and system for communication over multiple channels in a spread spectrum communication system |
US5663958A (en) | 1996-02-22 | 1997-09-02 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for dynamically selecting the length of mobile station burst communications on the reverse digital control channel |
US5844894A (en) | 1996-02-29 | 1998-12-01 | Ericsson Inc. | Time-reuse partitioning system and methods for cellular radio telephone systems |
US6112083A (en) * | 1996-03-27 | 2000-08-29 | Amsc Subsidiary Corporation | Full service dispatcher for satellite trunked radio service system |
US6112092A (en) | 1996-04-18 | 2000-08-29 | Lucent Technologies Inc. | Self-configurable channel assignment system and method |
US6473623B1 (en) | 1996-04-18 | 2002-10-29 | At&T Wireless Services, Inc. | Method for self-calibration of a wireless communication system |
US5910945A (en) | 1996-04-30 | 1999-06-08 | Trw Inc. | Method and apparatus for synchronizing communications in a satellite based telecommunications system |
US6396804B2 (en) | 1996-05-28 | 2002-05-28 | Qualcomm Incorporated | High data rate CDMA wireless communication system |
US5930230A (en) | 1996-05-28 | 1999-07-27 | Qualcomm Incorporated | High data rate CDMA wireless communication system |
US5859840A (en) | 1996-05-31 | 1999-01-12 | Qualcomm Incorporated | Spread spectrum communication system which defines channel groups comprising selected channels that are additional to a primary channel and transmits group messages during call set up |
US5828662A (en) | 1996-06-19 | 1998-10-27 | Northern Telecom Limited | Medium access control scheme for data transmission on code division multiple access (CDMA) wireless systems |
JPH1048459A (ja) * | 1996-07-30 | 1998-02-20 | Seiko Giken:Kk | 光デバイスおよび双方向通信システム |
US6061359A (en) * | 1996-08-02 | 2000-05-09 | Golden Bridge Technology, Inc. | Increased-capacity, packet spread-spectrum system and method |
US5862133A (en) * | 1996-08-02 | 1999-01-19 | Golden Bridge Technology | Packet-switched spread-spectrum system |
EP0827312A3 (de) | 1996-08-22 | 2003-10-01 | Marconi Communications GmbH | Verfahren zur Änderung der Konfiguration von Datenpaketen |
US5805567A (en) | 1996-09-13 | 1998-09-08 | Lucent Technologies Inc. | Orthogonal modulation scheme |
US6259724B1 (en) * | 1996-10-18 | 2001-07-10 | Telefonaktiebolaget L M Ericsson (Publ) | Random access in a mobile telecommunications system |
US5950131A (en) | 1996-10-29 | 1999-09-07 | Motorola, Inc. | Method and apparatus for fast pilot channel acquisition using a matched filter in a CDMA radiotelephone |
US6222828B1 (en) | 1996-10-30 | 2001-04-24 | Trw, Inc. | Orthogonal code division multiple access waveform format for use in satellite based cellular telecommunications |
US6215798B1 (en) | 1996-11-01 | 2001-04-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Multi-frame synchronization for parallel channel transmissions |
US5864546A (en) * | 1996-11-05 | 1999-01-26 | Worldspace International Network, Inc. | System for formatting broadcast data for satellite transmission and radio reception |
US5867490A (en) * | 1996-11-05 | 1999-02-02 | Worldspace International Network, Inc. | Direct radio broadcast receiver for providing frame synchronization and correlation for time division multiplexed transmissions |
US6195362B1 (en) | 1996-11-08 | 2001-02-27 | At&T Corporation | Resource pooling system and method in communication systems |
US6243372B1 (en) | 1996-11-14 | 2001-06-05 | Omnipoint Corporation | Methods and apparatus for synchronization in a wireless network |
EP0845877A3 (en) | 1996-11-28 | 2002-03-27 | Oki Electric Industry Co., Ltd. | Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected |
GB2320662B (en) | 1996-12-18 | 2001-06-20 | Dsc Telecom Lp | Apparatus and method of frame aligning information in a wireless telecommunications system |
US6373831B1 (en) | 1997-03-26 | 2002-04-16 | Nortel Networks Ltd. | Systems and methods of channel coding and inverse-multiplexing for multi-carrier CDMA systems |
FR2761557B1 (fr) | 1997-03-28 | 1999-04-30 | Alsthom Cge Alcatel | Procede de transmission sur une pluralite de supports de transmission, a repartition dynamique des donnees, et emetteur et terminal correspondants |
US5923650A (en) | 1997-04-08 | 1999-07-13 | Qualcomm Incorporated | Method and apparatus for reverse link rate scheduling |
US5914950A (en) | 1997-04-08 | 1999-06-22 | Qualcomm Incorporated | Method and apparatus for reverse link rate scheduling |
US5917852A (en) * | 1997-06-11 | 1999-06-29 | L-3 Communications Corporation | Data scrambling system and method and communications system incorporating same |
US6075792A (en) | 1997-06-16 | 2000-06-13 | Interdigital Technology Corporation | CDMA communication system which selectively allocates bandwidth upon demand |
US6236647B1 (en) | 1998-02-24 | 2001-05-22 | Tantivy Communications, Inc. | Dynamic frame size adjustment and selective reject on a multi-link channel to improve effective throughput and bit error rate |
US6151332A (en) | 1997-06-20 | 2000-11-21 | Tantivy Communications, Inc. | Protocol conversion and bandwidth reduction technique providing multiple nB+D ISDN basic rate interface links over a wireless code division multiple access communication system |
US6215795B1 (en) * | 1997-06-25 | 2001-04-10 | Sun Microsystems, Inc. | Packet spacing of multiple packet streams |
US6104708A (en) * | 1997-08-11 | 2000-08-15 | Bbn Corporation | Wireless data communications system |
AU8905598A (en) | 1997-08-13 | 1999-03-08 | Qualcomm Incorporated | Method and apparatus for interference cancellation for a high data rate user in a cdma system |
US6377809B1 (en) | 1997-09-16 | 2002-04-23 | Qualcomm Incorporated | Channel structure for communication systems |
US6389000B1 (en) | 1997-09-16 | 2002-05-14 | Qualcomm Incorporated | Method and apparatus for transmitting and receiving high speed data in a CDMA communication system using multiple carriers |
US6307840B1 (en) | 1997-09-19 | 2001-10-23 | Qualcomm Incorporated | Mobile station assisted timing synchronization in CDMA communication system |
US6469991B1 (en) | 1997-10-14 | 2002-10-22 | Lucent Technologies Inc. | Method for overload control in a multiple access system for communication networks |
US6285665B1 (en) | 1997-10-14 | 2001-09-04 | Lucent Technologies Inc. | Method for establishment of the power level for uplink data transmission in a multiple access system for communications networks |
US6567416B1 (en) | 1997-10-14 | 2003-05-20 | Lucent Technologies Inc. | Method for access control in a multiple access system for communications networks |
US6377548B1 (en) | 1997-10-14 | 2002-04-23 | Lucent Technologies Inc. | Method for admitting new connections based on measured quantities in a multiple access system for communications networks |
US6574211B2 (en) | 1997-11-03 | 2003-06-03 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
US6647057B1 (en) * | 1997-11-03 | 2003-11-11 | International Communications Products, Inc. | Link adapter interface for upgrading existing satellite communication system for enhanced modulation and coding |
US6064678A (en) | 1997-11-07 | 2000-05-16 | Qualcomm Incorporated | Method for assigning optimal packet lengths in a variable rate communication system |
US6201798B1 (en) * | 1997-11-14 | 2001-03-13 | Worldspace Management Corporation | Signaling protocol for satellite direct radio broadcast system |
US6262980B1 (en) | 1997-12-02 | 2001-07-17 | At&T Corp | Dynamic resource allocation method and apparatus for broadband services in a wireless communications system |
US6373834B1 (en) | 1997-12-19 | 2002-04-16 | Telefonaktiebolaget Lm Ericsson | Synchronization for cellular telecommunications network |
US6545986B1 (en) | 1997-12-31 | 2003-04-08 | Verizon Laboratories Inc. | CDMA forward link power control |
US6084919A (en) | 1998-01-30 | 2000-07-04 | Motorola, Inc. | Communication unit having spectral adaptability |
US6526039B1 (en) | 1998-02-12 | 2003-02-25 | Telefonaktiebolaget Lm Ericsson | Method and system for facilitating timing of base stations in an asynchronous CDMA mobile communications system |
US6208871B1 (en) | 1998-02-27 | 2001-03-27 | Motorola, Inc. | Method and apparatus for providing a time adjustment to a wireless communication system |
US7154914B1 (en) * | 1998-03-05 | 2006-12-26 | Forster Energy Llc | Through-timing of data transmitted across an optical communications system utilizing frequency division multiplexing |
US6504830B1 (en) | 1998-06-15 | 2003-01-07 | Telefonaktiebolaget Lm Ericsson Publ | Method, apparatus, and system for fast base synchronization and sector identification |
US6373860B1 (en) * | 1998-07-29 | 2002-04-16 | Centillium Communications, Inc. | Dynamically-assigned voice and data channels in a digital-subscriber line (DSL) |
US6298463B1 (en) | 1998-07-31 | 2001-10-02 | Nortel Networks Limited | Parallel concatenated convolutional coding |
US6590873B1 (en) * | 1999-02-05 | 2003-07-08 | Lucent Technologies Inc. | Channel structure for forward link power control |
US7133441B1 (en) * | 1999-02-23 | 2006-11-07 | Actelis Networks Inc. | High speed access system over copper cable plant |
US7593380B1 (en) | 1999-03-05 | 2009-09-22 | Ipr Licensing, Inc. | Variable rate forward error correction for enabling high performance communication |
US6614776B1 (en) * | 1999-04-28 | 2003-09-02 | Tantivy Communications, Inc. | Forward error correction scheme for high rate data exchange in a wireless system |
US6196362B1 (en) | 1999-05-13 | 2001-03-06 | Westinghouse Air Brake Company | Lock bolt with modified end cap for slack adjuster |
US6850506B1 (en) * | 1999-10-07 | 2005-02-01 | Qualcomm Incorporated | Forward-link scheduling in a wireless communication system |
DE19958510A1 (de) * | 1999-12-04 | 2001-06-07 | Bosch Gmbh Robert | Verfahren zum Betreiben eines Mobilfunknetzes |
US6415148B1 (en) * | 1999-12-11 | 2002-07-02 | Qualcomm, Incorporated | System and method for the detection of service from alternate wireless communication systems |
US7327775B1 (en) * | 1999-12-23 | 2008-02-05 | Nokia Corporation | CDMA receiver |
US7149223B2 (en) * | 2000-03-06 | 2006-12-12 | Juniper Networks, Inc. | Enhanced fiber nodes with CMTS capability |
DE10129611A1 (de) * | 2001-06-20 | 2003-01-09 | Tesa Ag | Haftklebemasse insbesondere für unpolare Oberflächen |
US6973601B2 (en) * | 2001-07-19 | 2005-12-06 | Tyco Telecommunications (Us) Inc. | System and method for automatic optimization of optical communication systems |
US7289476B2 (en) * | 2001-10-16 | 2007-10-30 | Nokia Corporation | Method and system to increase QoS and range in a multicarrier system |
JP3850736B2 (ja) * | 2002-02-06 | 2006-11-29 | 富士通株式会社 | 無線信号を利用して伝送される情報を判定する装置およびその方法 |
DE60203690T2 (de) * | 2002-02-12 | 2006-03-02 | Lucent Technologies Inc. | Verfahren und Vorrichtung zur Übertragung eines SDH/SONET Client-Signals als Dienstleistung |
US7257147B1 (en) * | 2002-12-20 | 2007-08-14 | Cypress Semiconductor Corporation | Encoding viterbi error states into single chip sequences |
-
1999
- 1999-04-28 US US09/301,484 patent/US6614776B1/en not_active Expired - Lifetime
-
2000
- 2000-04-20 AU AU46547/00A patent/AU4654700A/en not_active Abandoned
- 2000-04-20 EP EP00928288A patent/EP1173947B1/en not_active Expired - Lifetime
- 2000-04-20 WO PCT/US2000/010809 patent/WO2000065764A1/en active Application Filing
- 2000-04-20 DK DK00928288.0T patent/DK1173947T3/da active
-
2001
- 2001-10-26 NO NO20015240A patent/NO332803B1/no not_active IP Right Cessation
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2003
- 2003-08-04 US US10/634,148 patent/US7366154B2/en not_active Expired - Fee Related
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2008
- 2008-04-28 US US12/110,930 patent/US8045536B2/en not_active Expired - Fee Related
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2011
- 2011-10-21 US US13/278,691 patent/US9344220B2/en not_active Expired - Fee Related
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2012
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EP1173947A1 (en) | 2002-01-23 |
WO2000065764A1 (en) | 2000-11-02 |
NO332803B1 (no) | 2013-01-14 |
US9344220B2 (en) | 2016-05-17 |
NO20015240D0 (no) | 2001-10-26 |
US7366154B2 (en) | 2008-04-29 |
NO20121085L (no) | 2001-12-20 |
DK1173947T3 (da) | 2012-10-22 |
US8045536B2 (en) | 2011-10-25 |
US20050050429A1 (en) | 2005-03-03 |
US20120042223A1 (en) | 2012-02-16 |
NO20015240L (no) | 2001-12-20 |
NO334875B1 (no) | 2014-06-23 |
AU4654700A (en) | 2000-11-10 |
US20090055707A1 (en) | 2009-02-26 |
US6614776B1 (en) | 2003-09-02 |
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